Worksheet Chapter 10: Transport in Humans and Animals

1. Describe the sequence of electrical excitation events in the human heart that lead to ventricular contraction.

2. True or False: Red blood cells and large plasma proteins are able to pass easily through blood capillary walls to form part of the lymph.

3. Explain how interstitial (tissue) fluid is formed at the arterial end of a blood capillary.

4. State two differences between the structural characteristics of an Artery and a Vein.

5. True or False: The right lymphatic duct drains lymph from the entire lower half of the human body into the right subclavian vein.

6. Fill in the blank: The natural pacemaker of the heart located in the wall of the right atrium is the ________ node.

7. Explain the step-by-step blood clotting process starting from tissue injury up to the formation of a stable fibrin clot.

8. Compare the double circulatory system of an Amphibian with the double circulatory system of a Human.

9. A patient suffers from edema in their legs caused by a localized blockage in their lymphatic vessels. Explain why lymphatic obstruction leads to tissue swelling.

10. Which enzyme converts insoluble fibrinogen into insoluble fibrin threads during blood clot formation?